Why did we select this

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INTRODUCTION

• Why did we select this?
• Avoid accidents due to dazzling lights of the
  vehicles coming from opposite side of the road.
• Automatic Head Light Dimmer is very rare in
  Srilankan Market.And also function of this also
  not used in the vehicles used in Srilanka.
• Circuit is simple theoretical concept.
• Circuit is simple and low cost.
• Make convenience to drivers of always dimming
  head lights.

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Intro

• Product Goal
• The product should sense the light of the vehicle
  coming opposite and automatically dims the Head
  Lamp.
• Should cost less than Rs. 2000/ inclusive of all
  taxes
• Working as a team meeting deadlines.
• Producing a marketable product.

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Public survey

• After recognizing the product to be designed, a
  public survey has been done in order to find
  whether it is marketable. So a questionnaire was
  distributed among people using vehicles in
  different areas.
• According to the results almost all the people
  agreed that an automatic headlamp dimmer would
  certainly reduce the number of accidents
  happening these days.
• They were questioned about the configuration of
  the headlamp as well. Majority of the people
  wanted it to operate both automatically
  manually. Others wished to have a fully automated
  one.
• Other than that we learnt that people are very
  much concern about the price of the product. It
  should be affordable and should not intervene the
  existing lighting system.
• Since there are positive responses we decided to
  go ahead with the product. At the same time as
  our customers wish we decided to produce an low
  cost Automatic Headlamp Dimmer, which can be
  manually overwritten.

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Final circuit
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Components..
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2.2 Operation of the circuit. Description

• This circuit will activate a relay when light
  falls to a preset level. Light level can be
  adjusted with VR1 and the relay contacts may be
  used to operate an external light or buzzer.
• Introduction
• The light sensor used is the LDR. In bright light
  the resistance of the LDR can be as low as 80 ohm
  and at 50lux (darkness) the resistance increases
  to over 1 Mohm. The 1M control should provide a
  wide range for light intensities, if not its
  value may be increased. The op-amp senses the
  voltage difference between pins 2 and 3. The
  control VR1 is adjusted so that the relay is off,
  the output of the op-amp will be around 2 Volts.
  When light falls, the resistance of the photocell
  increases and the difference in input voltage is
  amplified by the op-amp, the output will swing
  towards full supply and drive the transistor and
  relay. The 270k resistor provides a small amount
  of hysteresis, so that the circuit switches on
  and off with slightly different light levels.
  This eliminates relay chatter. Take great care if
  you decide to wire the relay to activate a mains
  lamp. Make sure the relay contacts provide
  adequate isolation and have ample rating for the
  load.
• circuit

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Alternative 1

• Since our main targeting group is the owners of
  the vehicle, the advertisement propaganda can be
  done to convince them. In that the blame that the
  masters get because of their servants reluctance
  to dim the headlamp can be shown. At the same
  time they will not be penalized at the courts or
  police station for misuse of the headlamp.

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Alternative 3

• Another possible way of approaching the market
  is to introduce the device as a part of an
  insurance scheme. Comparing to the premium the
  cost of the device is very low so that it wont
  be significant. In a way Insurance company will
  be benefited.

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Alternative 4

• Introduce the device to a manufacturer of heavy
  vehicles. Comparing to the value of the vehicle
  the cost of the devise is just nothing. Even the
  customer wont feel that he is spending extra
  money.
• All most all the options are heavily
  concentrating on social responsibility. So the
  advertising propaganda can be carried on with
  either one of these alternatives or as a
  combination of them.

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Petitioning

• Here the main purpose is to give an incentive to
  the buyer to buy the device.
• One incentive is reimbursement of money if the
  device is not up to the expectations of the
  customer. So buyer can buy the product without
  any hesitation.
• Another incentive is to paste a sticker on the
  glass to distinguish the vehicle using the
  specific device from other ordinary vehicles.
• Replace the unit free of charge of the vehicles
  who has not recorded for breaching the road
  manners.

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Advertisement

• run

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• Cost for the components 5 Resistors Rs. 1.00/
• 2 Presets Rs. 5.00/
• OP-AMP Rs. 9.00/
• LDR Rs. 7.50/
• BC 109 Rs. 12.00/
• Relay Rs. 25.00/
• Diode Rs. 0.70/
• Condenser Rs. 2.00/
• 2 Regulators Rs. 40.00/
• Wires Rs.
• Switches Rs. 30.00/
• LED Rs. 3.00/
• Sub total Rs.
• Cost for the PCB
  Rs 60/
• Cost for the cover Rs. 100/
• Cost for the Packaging Rs. 50/
• Total Rs.

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• Total Rs.
• Since the daily output would be around 30 units
  Rs. 30
• Rs.
• Labour per day
  Rs. 3000/
• Rent and overheads
  Rs.
• Total Rs.
• Lets think the recovery period of the capital is
  4 years. So the advertising cost the molding
  cost would be spread over the 4 years. Assuming
  the monthly output to be remained constantly,
• Sales for the 4
  years Rs. 30 12 4
• Molding cost Rs.
• Advertising cost Rs.
• Cost per unit Rs. /43200
• Profit margin Rs. Per unit
• VAT 15 Rs. Per unit
• Selling Price Rs.

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Segmenting

• The device is produced mainly according to the
  heavy vehicle specifications. Therefore our
  concern is greatly on the heavy vehicle drivers.
  But in Sri Lanka most of the bus and lorry
  drivers are not the owners of them. Therefore it
  is not easy to convince them with their moral
  about our device. Since the vehicle is not their
  property, they would not spend their disposable
  income on this. So the main concern is on the
  owners of the vehicles.